Question

I need to send a CSV file in HTTP response. How can I set the output response as CSV format?

This is not working:

Response.ContentType = 'application/CSV'; 

Answer 1

Using text/csv is the most appropriate type.

You should also consider adding a Content-Disposition header to the response. Often a text/csv will be loaded by a Internet Explorer directly into a hosted instance of Excel. This may or may not be a desirable result.

Response.AddHeader('Content-Disposition', 'attachment;filename=myfilename.csv'); 

The above will cause a file ‘Save as’ dialog to appear which may be what you intend.